Machine for filing saws



'1. UPS. MACHINE FOR FILING SAWS.

APPLICATION FILED JULY 15. 1918.

4 Patented Mar.1,1922.

3 SHEETS-SHEET I. a 42 J. UPS. MACHINE F'OR FILING SAWS.

APPLICATION FILED JULY 1-5. 1918. 1

Patented Mar. 14, 1922.

a SHEETS-SHEET 2.

J. LIPS.

MACHINE FOR FILING SAWS.

AYPPLIQATION FILED JULY 15, 1918- Mara gums-sun a.

UNITED era-TEE.

JACOB LIPS, or mannanborn, SWITZERLAND.

ACHINE roe FILING saws. 1 Y

T 0 allwlzom it may concern:

Be it known that I, JACOB Lirs, manufacturer, a citizen of the Swiss Confederation, residing at N-ieder-Urdorf, Canton Zurich, Switzerland, have invented new anduseful Improvements in Machines for Filing Saws, of which the following is a specification My invention has relation to machines for filing saws, band saws and so on n which one or more files are movably mounted on a reciprocated slide or carriagetheir move. ment being controlled by a'steering device in such a manner that the different files or the different faces of one file'alter nate in their operation, one file or one face of. a file cutting a saw tooth in one direction and an other file or face of a file cutting the next-- following tooth in the opposite direction, thus filing the saw from alternate sides.

One object of the invention is to provide means to facilitate the mounting of the file or the files in the carriage in such a'manner that the working faces of the file or thefiles may be placed in theirtrue working position even by anunskilled person without loss of time etc. the files being automatically set in such a manner that their workin .faces run exactly parallel to the path of t e recipro eating carriage, therefore working with their full length and moreover in the proper po 7 sition to the saw to be sharpened, in suchga manner that the shape of the teeth isnot altered. j i i I attain this object by makinguse of adjusting devices, of gauges or the like and by providing holders and fastening meansfor the files to adjust and fix the file orfiles in their true position on the carrier so that the working "faces remain in engagement with the saw during the full working stroke. To simplify the machine and the handling thereof I arrange on one and the same file of. triangular oross'esection 'on each side of the file two cutting or working faces and move the file suchwise that the faces on one side work on two consecutive teeth of the saw in alternate direction. according to the setting of the'teeth. It is obvious that by employing only one file the adjustment is simplified and accurate work insured. i I

Other objects of the inventionrelate to the provision of minor parts co-operating with Specification of Iietters Patent.

the elements abovenoted and to details j'of construction all of Zwhi ch will be more tion:

. Patented M r,-14,1922; App1ication filed Jul 15, 1913. Serial 11011245954;

, clearly set forth in the 'allowing lspfcifica With the'above objects view i tion resides in'the part s and combinations of parts hereinafter described and particularly set forth the claimsappended :heretd] In 'the 'accompanying drawings a; saw filing-machine isshown by way of an examp le;-'-" "v i i Fig. 1 is a front view of the machine, 7 Fig.2 is a top view, and V V Fig. 3 a sectional sidejelevation, on line of-Figl'. 1 i Fig. 4"is asimilar view of'the same, onfa plane disclosing the lever i28-andlits con} nections. I if I Fig. "5;?isa detailelevation,showing the pivoted tongues 35 '3:6lwhich automatically operate said lever." p

' Fig. 6 is a detail sectionalview of the file and the-armsfof the file carrier and the means for mounting and. adjusting the file. Fig.7 is'a'detailelevation, and v adjusting, device for ,use in: connection with iny'iniproved'saw filingimachineg 'cFig. 9 is an elevation,andf

Fig'. 8"s'.a detail sectional view of file Fig. 10 is a vertical sectional; View on.

device for use in placing the .file in the ma; Ch ph adjusting the file. v p p Fig' 12' is a detail sectional View offanother 'form of gauge for adjusting the file."

The machine shown in the drawing com- Figsll is'an elevation of'a gauge foruse in prises a frame l' havin'g guide way's'g5 in whicha slide or carriage 2 is arranged;- To the slide 2a cross-head 3 is fastened having a; straightgroove-c runnin at a right-angle to the guide ways 5; A rol er 6proje'cts' into the groove l' which roller is m'ounted on a bolt 7 eccentrically arranged on a pulley 8;. The pulley .8 runs loosely on a shaft 9 mounted a bearing 1O of the firmer Beside the pulley'j8 an idle pulley 8 is arranged. lhe pulley 8'when rotated moves the slide 2 to and fro in the guide ways 5. On the. slide 2fth'ere are'arranged two arms 11, 12.c'arrying. between the 0l1lts of two screws,131a.file-carrier-M. hejOa fIier' 14. consists-'of'a'body part 15 having two arms theffile, andcis held thereon by meansof a faces 22, 23 between which there is a blank 25; .Theteeth; of the respective faces 22,23

are cut in difierent anglesand are arranged in reverse relation so that one fac'eworks in the one direction of the working stroke of the slide'2flandftheother 'face in the opposite direction. To bring thefile in and out of engagement with the saw 26 I provide on the body part 15 an arm 27 the free end of which restson a lever 28 having its fulcrum onthe pivot 30'. The. lever-28. eXtends outwardly through aflarge opening the slide 2 and isprovideduat its free end with arollerfil; 'The'lever 28 being on the slide 2follows the reciprocating movements .ofthe same and is moreover moved :up and down bringing thereby the working faces of the file 21 in and out of engagement with the saw. The lever 28 when depressed; rests on a set screw 33 during the working: strokeof spring 34:- To swing the lever 28 upwards in orc er to bringthe fi-le out of the saw I provide two'movable tongues 35, 36 projecting into the path of the roller-31. tongues35. 3.6 areinclined in opposite directions. If the slideyha's-finishedhalf of the entire .working stroke and aftertheface 22 has sharpened a tooth say in thedirection of the arrow A Fig.5 therollerBl strikes against 'thetongue35 and travels upwardly thereon and hencethe lever .28 is forced up; wardly swinging thereby the carrier 14 as indicatedby the arrow B (Fig. 3) thefile 21 co ningfthereby out. oft-he teeth of vthe saw 2'6. During the rest of the stroke of the sl-ide2the file21 is kept out of engagement with the saw because, the ;roller.31 after passing over-the tongue35 movesover a fixed guide 68 arranged adjacent to the upper pivoted end of the tongue 35. During thisjpart of theniovement of the slide-2. the is'shifted for one tooth. As soon as the slide 2 reaches the ,end .position and. ap- PT OXimately coinciding. with the reversal in the -dire cti,on of 'the ,slidei2 the roller -31 glides ojfi" thejguide 38. The spring 34 returns .thele'ver 28 ,to its-Eposition .on the screw 33 and the face "23 of-the file 21 is brought in its 7 w'orkingwposition. If the slide starts forthe return stroke the file 2'1 enters the saw 26 and th e face23-works on a;tooth 'offthe Half way on thereturn stroke jot the, s 1ide. 2 the roller 3'1 meets the tongue 36; an'dlis, thereby lifted: The carrier l l'iis again swung-Lent and the-H1621 leaves 7 the are i h f d a eib at The on whilst the slide finishes its return stroke. The roller 31 runs over theguide 39 arranged at the upper end of'the tongue 36 V and falls behind the lug 39 down to the setscrew33. The file 21 isagain in its working position andaft er reversal of the slide movement the face 22 enters the saw 26 and sharpens a tooth.

To hold the saw 26 in position I provide a -vise' cons'isting of a plate 40 firmly attached to the frame 1 and a second plate 41 which is movably mounted on the first named plate 40. The saw is slidably arranged i between theplates- 10 41. Plate 41 stands under the action of a spring-43 which'tends tomove the. plates 4.0, 4:1. apart. On plate act's moreoyer one arm 4t2pf a bifurcated lever .d twhrch is journalled at 45 on the plate 4-0. The ar'nr42 when-mow ing upwards: runs QiVQI' il Il inclined plane .l fon plate 41 pressing thereby the latter against the plate l0 and clamping the saw 26 firmly. Between the plates .40, .41 I arrange a wedge 4c6.(see-l*ig. 3) which forms an adjustable abutment for the saw 26. Said wedge bears at one edge against the backof the saw and at theopposite edge bears against the-shoulderon the plate 40. To swingthe lever 4&1 I provide an endless cam groove 47 on the faceiof the pulley 8 inwhichruns a roller 48 mounted onlever .44. Qneach rotation of pulley 8 g; itsw cam groove 17 1 and the roller e18 cause the lever 443cc make two strokes and-to hence I open and closethe vise twice. The second armed oii the lever 4L4: carries the pawls 51. 52 arranged to shift the saw 26 'twice" for one tooth during one rotation of the pulley 8 The .pawl's 51, 52 are"adjustajbly mounted in abracket.53 j-ournalled-at 54-to the arm vand held-by a spring 56 (see Fig. 3.) V'Ihe distancebetween the ends of 5;; the pawls 51, 52 corresponds to the pitch of the teeth oi the saw, thisxurangement being v made to ensure the shifting of the saweven whenone tooth sis v broken. The lower end of the bracket 53;- is provide d with an extension 59lwhichis kept in engagement with an adjustable abutment 55 by means ;.of a spring 56'. .Theabutrnentfih is provided withwtwo guide planesf57f58 connected by an inclined 7 plane. TWhen the lever 5&4 swings on its pivot the bracket 53 umoves up and down making a stroke of .predetermined length. The 'pawls 51, 52 take part on this .movementbut they :are kept out of engagement with the saw 26 as long the extension 59 slidesfon the plane 67. .As soon as the extension gt'gil passes frorn'gplane 57- to plane 58 the ends ofthe pawls 51,52 enterbetween the teeth and shift the saw during theremaining part otthe stroke. Byzadjustingr the abutment in vertical direction more or less ofth-e strokeof lever' 44; be'used for shifting the ..saw;.26 according to the pitch. T-he'fil e is provided at'its endsand in the middle with recesses'which when oppositeithe saw 26 allowthe insertion of the file in the interspaces between the teeth.

To mount the file 21 in the carrier 14 in such a'manner that the working :faces work in their full length I arrange sleeves 1.8 in slots 17 of the arms 16 of the carrier. The sleeves 18 may be rigidly fixed to the arms b means of thumb nuts 63 clam in y c the sleeves firmly on the arms.- lVithin each sleeve there isa pin or bolt for holding the ends of the file 21. To place the working faces of the file in a true parallel direction to the path of the slide 2 I arrange some auxiliary device to enable even vunskilled persons to place the file in its true position without much loss of time. One device is shown by way of an example in Figs. 9 and 10. This device consists of a bracket 70 having two arms 71 and in each arm a set screw 72. The bracket is adapted by means of the adjustable sleeves it will have the proper working position with respect to the saw to be sharpened, the flanks of the file having the proper angular position so that the teeth of the saw receive the proper shape desired.

To adjust the file in its true working position other devices may be used. The file may be placed in notches 78 provided in the arms 79 of the file carrier as shown in Figs. 7 and 8. To hold the file I provide 4 clamping screws 77 which press the file into the notches 78 the sides of which enclose the same angle as the flanks of the file. The file is held firmly and cannot be displaced during the work.

Other means for adjusting the file in.

its working position on the file carrier may be used for instance loose gauges 80 Which may be inserted in holes 81 of the carrier 83. The gauges 80; are readily removed as soon as the adjustment has taken place. One hole 81 is provided near each end of the file.

As shown in Fig. 11 the gauges may be fixed to the frame 1. In this case the gauge consists of an adjustable plate 85 which is fastened to the plate 40 by means of screws reaching through a slot 91. The front end of plate 85 is provided with a groove 92 adapted to'receive the file, the sides of the groove enclosing an angle of 60. The

plate. 85 "may ibev adjustedr by flmearis' of a screw 94:. Toadjustthefile the fc'a-rrier. is -moved so that each 'end ofthe file maybe inserted in the plate 85a'nd 'then'fixedr While I prefer touse inf connection with my devicevthe filepreviously described it maynin some instances be 'found iadvan tageous to use two files arrangedeither in line and with the working faces in one plane or arranged parallel to each other and to the path of the slide 2 in a common file carrier 14 in different arms thereof as shown in Fig. 10. The files are brought alternately in engagement with the saw, two consecutive teeth of the saw being filed in opposite direction; the files are moved in and out of their working position during the reversal oftheslide-stroke by substantially the same means as described with reference to Fig. 1. To adjust the two files on the file carrier the same devices may be used as described above the files which are arranged on separate arms and-in separate sleeves beof two slots arranged in the bracket as shown in Fig. 10. V

Having thus described my invention what I claim and desireto secure by Letters Pat- 'ent ofthe United States is 7 1. In a saw-filing machine, the combinaways, an automatically-operating vise adapted to grip the saw, a reciprocating file carriage, a file carrier journaled therein, a file g of triangular cross-section having two working faces on each side, adjustably mounted in said carrier, a device to tilt said file carrier at the ends and in the middle of the stroke of said carriage whereby the working faces of the file are alternately brought in orout of'their working position, means to feed the saw and means to adjust'the file in the file carrier. r

2. In a saw-filing machine, the combina tion I with a frame provided with guideing adjusted one after the other by means;

tion with a frame provided with guideways, an automatically-operating vise adapt 1 ed to grip the saw, a reciprocating file carriage. a file carrier journalled therein, a file of triangular cross-section having two working faces oneach side adjustably mounted in said carrier, a tilting lever connected with said file carrier, two movable inclined tongues on the frame reaching in the path of said tilting lever, adapted to swing the file carrier at the ends and in the middle of the stroke of the. carriage to bring the file in or out of its working position, means to feed the saw and means to adjust the file' in the file carrier.

3. In a saw-filing machine, the combina tion with a frame provided with guideway's, an automatically-operating vise adapt-r ed to grip the saw, a reciprocating file carriage, a. file carrier journalled. therein, and

carrying a file, a device to tilt said file cararm,-*a' spring holding said arm in engagement- With the guide, said guide'being adapted to'bri'ng the pawls in orout of the teeth and means to facilitate the adjustment of V the file on said file carrier.

In testimony whereof I'affix my si nature.

JACOB fines. 

